Since mid-April, Russia has focused its invasion of Ukraine on capturing the eastern region known as the Donbas. According to military reports, the fighting here has been largely positional battles without significant advancements by either side. Both Russia and Ukraine have built up their forces, regrouped, and continued artillery fire. In the last week, however, statements by officials in Kyiv have become more alarming, as if Ukraine's leadership is preparing the nation for a major defeat: the loss of Severodonetsk (one of the last big cities in the region still under Ukrainian control) and a "new Mariupol."